Method of analyzing residual chlorine

Details Method of analyzing residual chlorine Method of analyzing residual chlorine

1975-01-30

1978-12-12

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204195R, G01N 2746

Patent

active

041294793

ABSTRACT:
A continuous analyzer for accurately measuring the free chlorine residual in a chlorinated water supply having an ammonia content which gives rise to a combined chlorine residual whose bactericidal effectiveness is poor as compared to free chlorine. The analyzer includes an amperometric cell through which a sample from the supply is conducted, the cell being provided with a measuring electrode and a counter electrode. Connected in series with the electrodes is an external voltage source whose level is set to impress a potential on the measuring electrode at which the current flow in the cell as a result of the chlorine content of the sample increases progressively in accordance with the concentration of free chlorine residual, the cell being essentially insensitive to combined chlorine residual.

REFERENCES:
patent: 2350378 (1944-06-01), Wallace
patent: 2370871 (1945-03-01), Marks
patent: 2414411 (1947-01-01), Marks
patent: 3413199 (1968-11-01), Morrow
"Analytical Chemistry", vol. 19, No. 3, Mar., 1947, pp. 200-204.

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